South Coast AQMD—the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside and San Bernardino counties—covers an area of 10,743 square miles that is ...

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels ...

Recent data from the Environmental Protection Agency shows air quality in certain regions of the U.S. is deteriorating, ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily more accurate.

An air quality alert was issued on Sunday at 10:33 a.m. in effect until Tuesday at midnight. The alert is for Calabasas and ...

Major air pollutants have declined in recent decades, but USA TODAY’s analysis shows wildfire smoke is taking their place.

The EPA collects data for the AQI from some 4,000 air quality ... meaning the network of official sites is "fairly sparse," says Michael Jerrett, an air pollution expert at the University of ...

On Friday, the South Coast Air Quality Management District issued a smoke advisory for the fourth consecutive day, largely due to the elevated levels of unhealthful pollution billowing from the Eaton ...

As government sensors fall short, people are buying their own to protect against particulate pollution linked to heart and lung disease, cancer and a higher overall risk of premature death.

31, 2025 — Low levels of traffic-related air pollution harms the liver and may ... Overlooked Emissions in California's Salton Sea Air Basin Dec. 3, 2024 — Nitrogen oxide emissions from ...

Southern California ... the tubes that carry air into our lungs and end up in our bloodstream, Rutland said. Los Angeles already has the nation's worst ozone pollution, which has been described ...